There are certain scenarios when you may be asked to make changes to your PHP configuration. Specifically, you may be directed to edit a file on your server called php.ini and to increase the PHP Memory limit (memory_limit)
The memory_limit is a setting managed through the PHP Options which max amount of memory a script may consume. This value should be set at least as big as post_max_size.
While do not allow direct changes to PHP.ini on our servers. However, PHP configuration changes can be made from cPanel by following these steps:
1) Log into cPanel.
2) Look for the SOFTWARE section and click on Select PHP version
3) In the new window click on the Switch To PHP Options button.
4) Here you can locate the memory_limit and click on the value.
A dropdown menu or text input box will appear, allowing you to change the value as required. Check your script, plugin, or theme’s documentation (or an on-screen error message) to find the correct value.
5) Once you’ll do the change, the new value will be automatically updated. If the change was successful, you will see a green box with a message which will confirm that the change has been applied.
That’s all! Now you know how to increase the PHP Memory Limit in cPanel